front 1 Sperm is produced in the __________ of the testes. | back 1 seminiferous tubules |
front 2 Sperm is stored in the __________. | back 2 epididymis |
front 3 Why are the male testes located in the scrotum outside the body? | back 3 Immature sperm are temperature sensitive |
front 4 A man who has had a successful orchiectomy may still be able to have children because ______. | back 4 the remaining testis is able, by itself, to produce a sufficient amount of testosterone
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front 5 Why does meiosis involve two nuclear divisions rather than one, as in mitosis? | back 5 Meiosis reduces the chromosome number by half. |
front 6 At what point during meiosis do homologous chromosomes pair up? | back 6 prophase I |
front 7 During meiosis, what does crossover promote? | back 7 Crossover promotes increased genetic variability among gametes. |
front 8 Which of the following results from spermiogenesis? | back 8 sperm |
front 9 Which of the following is the haploid cell produced as a result of meiosis I? | back 9 secondary spermatocyte |
front 10 Which of the following cells is returned to the basal lamina to continue the pool of dividing germ cells? | back 10 type A daughter cell or spermatogonium |
front 11 Which of the following inhibits the release of FSH from the anterior pituitary and GnRH from the hypothalamus when the sperm count is high? | back 11 inhibin |
front 12 Which of the following keeps the concentration of testosterone in the vicinity of the spermatogenic cells high to stimulate spermatogenesis? | back 12 androgen-binding protein (ABP) |
front 13 Which hormone promotes the formation of secondary sex characteristics such as the appearance of pubic, axillary, and facial hair, enhanced hair growth on the chest, and a deepening voice? | back 13 testosterone |
front 14 The number of chromosomes in a human gamete is __________; this is referred to as the __________ chromosome number. | back 14 23; haploid |
front 15 Genetic variation of individual chromosomes occurs during __________. | back 15 prophase I |
front 16 Which of the following occurs during spermiogenesis? | back 16 sperm are produced |
front 17 Enzymes that allow sperm to penetrate the egg are located in the __________ of the sperm cell. | back 17 acrosome |
front 18 The release of __________ encourages interstitial endocrine cells to release __________. | back 18 luteinizing hormone; testosterone |
front 19 What is the product of spermatogenesis? | back 19 formation of haploid spermatozoa |
front 20 Which of the following organs is NOT a part of the HPG axis? | back 20 posterior pituitary gland |
front 21 What is the function of the blood testis barrier? | back 21 to prevent activation of the immune system of the male against the developing sperm |
front 22 Although effective in treating erectile dysfunction, Viagra has the side effect of reducing systemic blood pressure by causing ______. | back 22 relaxation of muscle tissue in arteries |
front 23 What part of the female duct system is the usual site of fertilization of the ovulated oocyte? | back 23 uterine (fallopian) tube (oviduct) |
front 24 Which structure of the female's external genitalia has erectile tissue like the penis? | back 24 clitoris |
front 25 The __________, a layer of the endometrium, is shed during each menstruation and is then regenerated by the __________. | back 25 stratum functionalis; stratum basalis |
front 26 The mammary glands are present in both sexes. | back 26 True |
front 27 Which of the following is an INCORRECT matching of female reproductive structures with their functions? | back 27 xxxuterine tube/transport unfertilized ovum to uterus for removal from the body
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front 28 Which layer of the uterus is the site for implantation of a fertilized egg? | back 28 stratum functionalis of the endometrium |
front 29 Which of the following conditions might contribute to an increased probability of having an ectopic pregnancy? | back 29 decreased number of cilia in the uterine tubes |
front 30 Which of the following cells is released during ovulation? | back 30 secondary oocyte |
front 31 Why CAN'T polar bodies be fertilized? | back 31 Polar bodies lack nutrient-containing cytoplasm |
front 32 How many functional gametes are produced by oogenesis? | back 32 one functional gamete |
front 33 What event occurs during the proliferative phase? | back 33 ovulation |
front 34 During what phase of the female's uterine (menstrual) cycle is the uterine lining shed? | back 34 menstrual phase |
front 35 What hormone promotes ovulation? | back 35 luteinizing hormone (LH) |
front 36 Formation of a secondary oocyte occurs during __________. | back 36 the follicular phase |
front 37 A surge in __________ directly triggers ovulation. | back 37 luteinizing hormone (LH) |
front 38 During the secretory phase of the uterine cycle __________. | back 38 the endometrium prepares for implantation |
front 39 Which of the following is an effect of estrogen in females? | back 39 promotes oogenesis |
front 40 Oocytes only complete meiosis II if they are fertilized. | back 40 True
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front 41 Dehydroepiandrosterone (DHEA) is the main androgen that is associated with female libido. | back 41 True |
front 42 Why does only one egg, rather than four eggs, develop during oogenesis, given that spermatogenesis results in four sperm formed from one stem cell? | back 42 The unequal cytoplasmic division that results in one egg and three polar bodies ensures that a fertilized egg has ample nutrients for its journey to the uterus. |
front 43 Amenorrhea can occur in women engaged in extremely strenuous physical activity, and also occurs in women who ______. | back 43 are pregnant |
front 44 Which of the following is NOT a sexually transmitted bacterial disease? | back 44 xxxgenital herpes
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front 45 What determines the gender (sex) of a child? | back 45 sex chromosomes |
front 46 Nondisjunction may occur due to ______. | back 46 -failure of sister chromatids to separate properly during anaphase II
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front 47 If embryonic testes do not produce testosterone, a genetic male develops female external genitalia. However, if embryonic testes properly produce testosterone, but a genetic male nevertheless develops female external genitalia, the cause could be ______. | back 47 a mutation in the gene that codes for the testosterone receptor |